Path: utzoo!utgpu!water!watmath!clyde!att!rutgers!bellcore!tness7!texbell!bigtex!james
From: james@bigtex.cactus.org (James Van Artsdalen)
Newsgroups: comp.dcom.modems
Subject: Re: Hayes 9600 sysop offer - a sour deal.
Message-ID: <9283@bigtex.cactus.org>
Date: 15 Oct 88 21:19:14 GMT
References: <8810081712.AA14615@ucbvax.Berkeley.EDU> <1394@percival.UUCP> <16738@shemp.CS.UCLA.EDU>
Organization: F.B.N. Software, Austin TX
Lines: 30

In article <16738@shemp.CS.UCLA.EDU>, Casey Leedom writes:

>   There are a *LOT* of applications that need as much bandwidth as you
> can muster in *BOTH* directions.

Actually, I would not be so sure of this.  Certainly human usage to
call up BBSs or download/upload data don't require symetric transfers
by any stretch of the imagination.  As for machine to machine links,
almost none of my uucp links on bigtex are symetric.  It seems
particularly clear that V.32 connections would be slower than PEP for
all but two links, since only a couple of links ever show much symetry
at all.  For SLIP types applications I imagine things average out to
make the data transfers more symetric (particularly given TCP/IP's
high overhead), but even Internet applications such as rlogin,
sendmail and ftp are fundementally very asymetric (even though I
understand current implementations of these may not be).

>   Don't let a low quality communication standard cloud your view.  UUCP
> is nice because almost everyone talks it these days, but it's not that
> good.  Until new modems came along that mirrored UUCP's half duplex
> nature, it was pathetic.

Actually, UUCP 'g' does much better with normal 2400bps/1200bps modems
than do Xmodem or Kermit.  I assume this is also true on V.32 modems.
It's not Zmodem and it's not a full-duplex protocol, but it seems to
work well...  Xmodem and Kermit are almost useless over PC Pursuit (which
acts half duplex), whereas UUCP 'g' can get 50% throughput.
-- 
James R. Van Artsdalen      james@bigtex.cactus.org      "Live Free or Die"
Home: 512-346-2444 Work: 338-8789       9505 Arboretum Blvd Austin TX 78759